

Also, 64-bit applications can access more memory than 32-bit applications (up to 18.4 million Petabytes). Computers running 64-bit versions of Windows generally have more resources-such as processing power and memory-than their 32-bit predecessors. The 64-bit version is the right choice if you plan to use large files, if you have a lot of files, and if you have a computer that's running a 64-bit version of Windows.
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For more information, see What version of OneDrive am I using? To move from the 32-bit to 64-bit (or vice versa) you'll need to make sure the OneDrive version you install is the same version as you currently have, or newer. You can now download the 64-bit version for use with OneDrive work, school, and home accounts. We know this has been a long awaited and highly requested feature, and we're thrilled to make it available for early access. We’re excited to announce that the 64-bit OneDrive sync client for Windows is now available as a public preview!
